Both of those are forgivable though. "Could of" seems to be a consequence of the contraction "could've", which sounds more like "could of" than "could have", and so is a reasonable mistake to make.
As for "its"- while it's annoying no doubt, I find I can lay the blame for my usage of the wrong type firmly at the feet of my bloody smartphone, which corrects "its" to "it's" everytime without fail, despite it being the second choice in the list of potentials the screen throws up. The word being only three letters long and correctly spelled both ways and so not underlined in red, it often slips past my notice.
People who say "pacific" rather than "specific" however, they deserve a spanking.
SBT
As for "its"- while it's annoying no doubt, I find I can lay the blame for my usage of the wrong type firmly at the feet of my bloody smartphone, which corrects "its" to "it's" everytime without fail, despite it being the second choice in the list of potentials the screen throws up. The word being only three letters long and correctly spelled both ways and so not underlined in red, it often slips past my notice.
People who say "pacific" rather than "specific" however, they deserve a spanking.
SBT